Wireless power transmitter, wireless power receiver, and method of operating the same

Abstract

According to embodiments, a wireless power transmitter may include: a communication module comprising communication circuitry; a power transmission circuit configured to transmit wireless power; and a processor. The processor may be configured to: establish a communication connection with a wireless power receiver using the communication module, control the communication module to transmit information about a first period to the wireless power receiver via the communication connection, control the power transmission circuit to transmit first power of a first frequency and a first magnitude to an outside, control the communication module to receive information about a second frequency of second power received at the wireless power receiver from the wireless power receiver via the communication connection, control the communication module to release the communication connection, based on the first frequency being different from the second frequency, and control the power transmission circuit to transmit third power of a magnitude different from the first magnitude of the first power to the outside during the first period, based on the first frequency corresponding to or substantially identical to the second frequency.

What is claimed is: 
     
       1. A wireless power transmitter comprising:
 a communication module comprising communication circuitry; 
 a power transmission circuit configured to transmit wireless power; and 
 a processor, 
 wherein the processor is configured to: 
 establish a communication connection with a wireless power receiver using the communication module, 
 control the communication module to transmit information about a first period to the wireless power receiver via the communication connection, 
 control the power transmission circuit to transmit first power of a first frequency and a first magnitude to an outside, 
 control the communication module to receive, from the wireless power receiver via the communication connection, information about a second frequency of second power received at the wireless power receiver, 
 based on the first frequency being different from the second frequency, control the communication module to release the communication connection, and 
 based on the first frequency corresponding to the second frequency, control the power transmission circuit to transmit third power of a magnitude different from the first magnitude of the first power to the outside during the first period. 
 
     
     
       2. The wireless power transmitter of  claim 1 , wherein the processor is configured to, based on the first frequency corresponding to the second frequency, control the power transmission circuit to transmit the third power by adjusting the third power to have a third frequency different from the first frequency of the first power. 
     
     
       3. The wireless power transmitter of  claim 2 , wherein the third frequency is lower than the first frequency. 
     
     
       4. The wireless power transmitter of  claim 2 , wherein the processor is configured to determine one of a plurality of frequencies within a first frequency range as the first frequency. 
     
     
       5. The wireless power transmitter of  claim 4 , wherein the first frequency range is set to a range higher than the third frequency and lower than a specified frequency. 
     
     
       6. The wireless power transmitter of  claim 1 , wherein the processor is configured to determine one of a plurality of periods within a first period range as the first period. 
     
     
       7. The wireless power transmitter of  claim 6 , wherein the first period range is set to a range shorter than a specified period. 
     
     
       8. The wireless power transmitter of  claim 1 , wherein the processor is configured to control the power transmission circuit to transmit fourth power during a second period after transmitting the third power during the first period. 
     
     
       9. The wireless power transmitter of  claim 8 , wherein the second period is fixed to a specified value. 
     
     
       10. The wireless power transmitter of  claim 8 , wherein the processor is configured to, based on the communication connection not being released during the first period during which the third power is transmitted, control the power transmission circuit to transmit the fourth power during the second period. 
     
     
       11. The wireless power transmitter of  claim 8 , wherein the processor is configured to determine whether to maintain the communication connection based on a load measured through the power transmission circuit while transmitting the fourth power. 
     
     
       12. The wireless power transmitter of  claim 11 , wherein the processor is configured to determine to maintain the communication connection based on the measured load being within a specified range. 
     
     
       13. The wireless power transmitter of  claim 11 , wherein the processor is configured to:
 control the communication module to receive, from the wireless power receiver via the communication connection, information about a first load value related to the wireless power receiver or a first load range related to the wireless power receiver, and 
 determine to maintain the communication connection based on the measured load corresponding to the first load value or the measured load being within the first load range. 
 
     
     
       14. A method of operating a wireless power transmitter, the method comprising:
 establishing a communication connection with a wireless power receiver, using a communication module of the wireless power transmitter; 
 transmitting information about a first period to the wireless power receiver via the communication connection; 
 transmitting first power of a first frequency and a first magnitude to an outside through a power transmission circuit of the wireless power transmitter; 
 receiving, from the wireless power receiver via the communication connection, information about a second frequency of second power received at the wireless power receiver; 
 based on the first frequency being different from the second frequency, releasing the communication connection; and 
 based on the first frequency corresponding to the second frequency, transmitting third power of a magnitude different from the first magnitude of the first power to the outside during the first period through the power transmission circuit. 
 
     
     
       15. The method of  claim 14 , wherein transmitting the third power to the outside during the first period comprises transmitting the third power by adjusting the third power to have a third frequency different from the first frequency of the first power. 
     
     
       16. The method of  claim 14 , further comprising determining one of a plurality of frequencies within a first frequency range as the first frequency. 
     
     
       17. The method of  claim 16 , wherein the first frequency range is set to a range higher than the third frequency and lower than a specified frequency. 
     
     
       18. The method of  claim 14 , further comprising determining one of a plurality of periods within a first period range as the first period. 
     
     
       19. The method of  claim 14 , further comprising:
 based on the communication connection not being released during the first period during which the third power is transmitted, transmitting the fourth power during the second period through the power transmission circuit; and 
 determining whether to maintain the communication connection based on a load measured through the power transmission circuit while transmitting the fourth power. 
 
     
     
       20. A wireless power receiver comprising:
 a communication module comprising communication circuitry; 
 a power reception circuit configured to receive wireless power; and 
 a processor, 
 wherein the processor is configured to: 
 establish a communication connection with a wireless power transmitter using the communication module, 
 control the communication module to receive information about a first period from the wireless power transmitter via the communication connection, 
 identify a first frequency and a first magnitude of first power identified at at least one point of the power reception circuit, 
 control the communication module to transmit information about the first frequency of the first power to the wireless power transmitter via the communication connection, 
 identify a second magnitude of second power identified at the at least one point of the power reception circuit, the second magnitude being different from the first magnitude of the first power, 
 identify a second period during which the second power is received, 
 based on the first period being different from the second period, control the communication module to release the communication connection, and 
 based on the first period being substantially identical to the second period, control the communication module to maintain the communication connection.